What is a DDoS attack?
A Distributed Denial of Service (DDos) attack is a malicious attempt to make an online service, such as a website,application, or API, unavailable by overloading it with web traffic from multiple source IPs.
Unlike a traditional Denial-of-Service (DoS) attack, which originates from a single system, A DDoS attack uses a large network of compromised devices, often referred to as a “botnet”. These infected systems simultaneously send huge amounts of traffic to a target, consuming its bandwidth and processing power until the service becomes unresponsive or completely unavailable.
The impact can be quick and severe. As servers become overloaded, genuine users are unable to access your website or application, resulting in downtime, lost revenue, and damage to customer trust.
How does a DDoS attack work?
A DDoS attack starts with the creation of a botnet. Cybercriminals infect thousands of devices connected to the internet, such as computers, routers, or IoT devices, with malware, allowing them to control these systems remotely. Once the attacker has built this network, they can command all the compromised devices to send requests to a single target simultaneously.
The flood of traffic overwhelms the target’s infrastructure, exhausting available resources such as bandwidth, memory, and CPU. As a result, legitimate traffic can no longer get through, and the service either slows down significantly or goes offline entirely. Depending on the sophistication of the attack and the defences in place, this disruption can last anywhere from a few minutes to several days.
Why do DDoS attacks happen?
The motives behind DDoS attacks can vary. In many cases, attackers launch them as a form of extortion, demanding a ransom payment, often in cryptocurrency, to stop the disruption. Others are motivated by activism or protest, using attacks as a means of drawing attention to political or social causes.
Some DDoS attacks are driven by competition, with rival organisations attempting to take competitors offline to gain an advantage. In more sophisticated cases, DDoS attacks are used as a diversion tactic, by overwhelming a business’s defences while other malicious activities, such as data theft or network intrusion, take place undetected.
Who is at risk of a DDoS attack?
Any business with an online presence is a potential target for a DDoS attack. However, those who rely heavily on uptime or handle high-value transactions are particularly at risk. Retail and eCommerce businesses can lose sales and damage customer loyalty if their websites are unavailable. Financial services face the risk of disrupted trading and online banking systems, while government and educational institutions can experience interruptions to essential services.
Gaming, media, and entertainment platforms are also frequent targets, often attacked during periods of high demand. Although larger businesses are attractive targets due to their visibility, small and medium-sized businesses are not exempt. In fact, they are often more vulnerable, as they may lack the same level of resources and protection as a larger organisation.
The impact of a DDoS attack
The immediate consequence of a DDoS attack is downtime, but the full impact extends past temporary disruptions. Every minute of unavailability can result in lost revenue and decreased productivity. This means that customers who are unable to access your services may take their business elsewhere, damaging brand reputation, long-term trust, and revenue.
How to prevent and mitigate a DDoS attack
Protecting against DDoS attacks requires a proactive and multi-layered approach. Your business should implement measures which can identify, filter, and block malicious traffic before it reaches critical infrastructure. Load balancing and failover systems can help distribute legitimate requests, maintaining your availability even when the traffic is high.
Scalability, continuous monitoring, and early detection are imperative in order for security teams to respond quickly to anomalies before they escalate. Partnering with a trusted managed service provider (MSP) can give your business access to best-in-class protection, expert monitoring, and 24/7/365 support, ensuring defenses continue to adapt as security threats evolve.
Protect your services from disruption
A DDoS attack can occur at any time, however, with the right protection in place, your business does not have to experience downtime or data loss.
To learn more about our managed DDoS protection and how we can defend your services against attacks, read our downloadable DDoS Protection Fact Sheet or contact us, and one of our experts will get in touch to discuss the most effective protection strategy for your business.
